Big Power 454 Aluminum Assembled LSR Short Block

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  • Regular price $ 15,500.00
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1,500 HP Capable

Premium LSR short block assembled and proven by Mast Motorsports.  Assembled with MADE in the USA parts

    454 Cubic Inch

    • LSR Tall Deck
    • ARP Hardware
    • Callies Magnum Crank
    • Callies Ultra Rods
    • 4.125 Bore
    • 4.250 Stroke
    • 6.460 Rod Length
    • Compression Height 1.150
    • Wiseco Premium Coated Piston


    LSR Block Features

    • 100% Made in USA
    • 356 T6 Premium Aluminum
    • Spun Ductile Iron Sleeves
    • Cross Braced Lifter Valley with Individual Drain Backs
    • 40% larger Main Cap Surface with a Double Crossbolt Option
    • Short or Tall deck blocks feature a Heavy Duty 0.750" deck thickness
    • Added Stock to the Front and Rear Valley Walls
    • Added 7th Transmission Bolt Hole to Accept Early Style GM Transmission
    • Maximized Cranksaddle Radius​
    • Front Oil Feed Line Can Be Restricted for Mechanical Lifter Options
    • 6 Bolt Cylinder Head Pattern
    • All OEM LSX parts such as covers, pans and accessories work seemlessly with the LSR


    LSR Block Specs

    • Standard Deck:  9.240"
    • Tall Deck: 9.720
    • Bore Range: 4.065-4.190
    • Weight: 113lbs w/main caps


     LSR Block Options

    • ARP Main Stud Options
    • Cam Bore Can Be Machined to Accept 60mm Roller Bearings
    • Lifter Bore can accept larger bore or key way style lifter
    • Double Cross Bolt Option- Increases to 8 Bolt Main


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